/**********************************************************************************************
*
*   rcore_desktop_win32 - Functions to manage window, graphics device and inputs
*
*   PLATFORM: DESKTOP: WIN32
*       - Windows (Win32, Win64)
*
*   LIMITATIONS:
*       - Initial development stage, lot of functionality missing
*       - No support for MOUSE_BUTTON_FORWARD/MOUSE_BUTTON_BACK
*
*   POSSIBLE IMPROVEMENTS:
*       - Improvement 01
*       - Improvement 02
*
*   ADDITIONAL NOTES:
*       - TRACELOG() function is located in raylib [utils] module
*
*   CONFIGURATION:
*       #define RCORE_PLATFORM_CUSTOM_FLAG
*           Custom flag for rcore on target platform -not used-
*
*   DEPENDENCIES:
*       - Win32 API (windows.h)
*
*
*   LICENSE: zlib/libpng
*
*   Copyright (c) 2013-2025 Ramon Santamaria (@raysan5) and contributors
*
*   This software is provided "as-is", without any express or implied warranty. In no event
*   will the authors be held liable for any damages arising from the use of this software.
*
*   Permission is granted to anyone to use this software for any purpose, including commercial
*   applications, and to alter it and redistribute it freely, subject to the following restrictions:
*
*     1. The origin of this software must not be misrepresented; you must not claim that you
*     wrote the original software. If you use this software in a product, an acknowledgment
*     in the product documentation would be appreciated but is not required.
*
*     2. Altered source versions must be plainly marked as such, and must not be misrepresented
*     as being the original software.
*
*     3. This notice may not be removed or altered from any source distribution.
*
**********************************************************************************************/

// Move windows.h symbols to new names to avoid redefining the same names as raylib
#define CloseWindow CloseWindowWin32
#define Rectangle RectangleWin32
#define ShowCursor ShowCursorWin32
#define DrawTextA DrawTextAWin32
#define DrawTextW DrawTextWin32
#define DrawTextExA DrawTextExAWin32
#define DrawTextExW DrawTextExWin32

#define WIN32_LEAN_AND_MEAN
#include <windows.h>

#undef CloseWindow      // raylib symbol collision
#undef Rectangle        // raylib symbol collision
#undef ShowCursor       // raylib symbol collision
#undef LoadImage        // raylib symbol collision
#undef DrawText         // raylib symbol collision
#undef DrawTextA
#undef DrawTextW
#undef DrawTextEx       // raylib symbol collision
#undef DrawTextExA
#undef DrawTextExW

#include <windowsx.h>
#include <shellscalingapi.h>
#include <versionhelpers.h>

#if !defined(GRAPHICS_API_OPENGL_11_SOFTWARE)
    #include <GL/gl.h>
#endif

//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------

// NOTE: appScreenSize is the last screen size requested by the app,
// the backend must keep the client area this size (after DPI scaling is applied)
// when the window isn't fullscreen/maximized/minimized
typedef struct {
    HWND hwnd;              // Window handler
    HDC hdc;                // Graphic context handler
    HGLRC glContext;        // OpenGL context handler

    // Software renderer variables
    HDC hdcmem;             // Memory graphic context handler
    HBITMAP hbitmap;        // GDI bitmap handler
    unsigned int *pixels;   // Pointer to pixel data buffer (BGRA format)

    unsigned int appScreenWidth;
    unsigned int appScreenHeight;
    unsigned int desiredFlags;

    LARGE_INTEGER timerFrequency;
} PlatformData;

// Define WGL function pointer types (no wglext.h needed)
typedef HGLRC (WINAPI *PFNWGLCREATECONTEXTATTRIBSARBPROC)(HDC, HGLRC, const int *);
typedef BOOL (WINAPI *PFNWGLCHOOSEPIXELFORMATARBPROC)(HDC, const int *, const FLOAT *, UINT, int *, UINT *);
typedef BOOL (WINAPI *PFNWGLSWAPINTERVALEXTPROC)(int);
typedef const char *(WINAPI *PFNWGLGETEXTENSIONSSTRINGARBPROC)(HDC hdc);

//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
extern CoreData CORE;                   // Global CORE state context

static PlatformData platform = { 0 };   // Platform specific data

// Required WGL functions
static PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB = NULL;
static PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB = NULL;
static PFNWGLSWAPINTERVALEXTPROC wglSwapIntervalEXT = NULL;
static PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB = NULL;

// --------------------------------------------------------------------------------
// This part of the file contains pure functions that never access global state
// This distinction helps keep the backend maintainable as the inputs and outputs
// of every function called in this section can be fully derived from the call-site alone
// --------------------------------------------------------------------------------

// Prevent any code in this part of the file from accessing the global CORE state
#define CORE DONT_USE_CORE_HERE

//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
#define A_TO_W_ALLOCA(outWstr, inAnsi)   do {                   \
    size_t outLen = AToWLen(inAnsi);                            \
    outWstr = (WCHAR *)alloca(sizeof(WCHAR)*(outLen + 1));      \
    AToWCopy(inAnsi, outWstr, outLen);                          \
    outWstr[outLen] = 0;                                        \
} while (0)

#define STYLE_MASK_ALL          0xffffffff
#define STYLE_MASK_READONLY     (WS_MINIMIZE | WS_MAXIMIZE)
#define STYLE_MASK_WRITABLE     (~STYLE_MASK_READONLY)

#define STYLE_FLAGS_RESIZABLE   WS_THICKFRAME

#define STYLE_FLAGS_UNDECORATED_OFF     (WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX)
#define STYLE_FLAGS_UNDECORATED_ON      WS_POPUP

#define WINDOW_STYLE_EX         0

#define CLASS_NAME              L"raylibWindow"

#define FLAG_MASK_OPTIONAL      (FLAG_VSYNC_HINT)
#define FLAG_MASK_REQUIRED      ~(FLAG_MASK_OPTIONAL)

// Flags that have no operations to perform during an update
#define FLAG_MASK_NO_UPDATE     (FLAG_WINDOW_HIGHDPI | FLAG_MSAA_4X_HINT)

#define WM_APP_UPDATE_WINDOW_SIZE (WM_APP + 1)

#define WGL_DRAW_TO_WINDOW_ARB              0x2001
#define WGL_ACCELERATION_ARB                0x2003
#define WGL_SUPPORT_OPENGL_ARB              0x2010
#define WGL_DOUBLE_BUFFER_ARB               0x2011
#define WGL_PIXEL_TYPE_ARB                  0x2013
#define WGL_COLOR_BITS_ARB                  0x2014
#define WGL_RED_BITS_ARB                    0x2015
#define WGL_RED_SHIFT_ARB                   0x2016
#define WGL_GREEN_BITS_ARB                  0x2017
#define WGL_GREEN_SHIFT_ARB                 0x2018
#define WGL_BLUE_BITS_ARB                   0x2019
#define WGL_BLUE_SHIFT_ARB                  0x201a
#define WGL_ALPHA_BITS_ARB                  0x201b
#define WGL_ALPHA_SHIFT_ARB                 0x201c
#define WGL_DEPTH_BITS_ARB                  0x2022
#define WGL_STENCIL_BITS_ARB                0x2023
#define WGL_TYPE_RGBA_ARB                   0x202b

// Context acceleration types
#define WGL_NO_ACCELERATION_ARB             0x2025      // OpenGL 1.1 GDI software rasterizer
#define WGL_GENERIC_ACCELERATION_ARB        0x2026
#define WGL_FULL_ACCELERATION_ARB           0x2027      // OpenGL hardware-accelerated, using GPU-drivers provided by vendor

// WGL_ARB_multisample extension supported
#define WGL_SAMPLE_BUFFERS_ARB              0x2041      // Multisampling: 1 if multisample buffers are supported
#define WGL_SAMPLES_ARB                     0x2042      // Multisampling: Number of samples per pixel (4, 8, 16)

// WGL_ARB_framebuffer_sRGB extension supported
#define WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB    0x20a9      // GL_TRUE if the framebuffer can do sRGB conversion

#define WGL_NUMBER_PIXEL_FORMATS_ARB        0x2000
#define WGL_CONTEXT_MAJOR_VERSION_ARB       0x2091
#define WGL_CONTEXT_MINOR_VERSION_ARB       0x2092
#define WGL_CONTEXT_PROFILE_MASK_ARB        0x9126
#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB    0x00000001
#define WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
#define WGL_CONTEXT_ES_PROFILE_BIT_EXT		0x00000004
#define WGL_CONTEXT_ES2_PROFILE_BIT_EXT		0x00000004

//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------
// Maximize-minimize request types
typedef enum {
    MIZED_NONE,
    MIZED_MIN,
    MIZED_MAX
} Mized;

// Flag operations
// NOTE: Some ops need to be deferred
typedef struct {
    DWORD set;
    DWORD clear;
} FlagsOp;

// Monitor info type
typedef struct {
    HMONITOR needle;
    int index;
    int matchIndex;
    RECT rect;
} MonitorInfo;

//----------------------------------------------------------------------------------
// Module Internal Functions Declaration
//----------------------------------------------------------------------------------
// Get ASCII to WCHAR length
static size_t AToWLen(const char *ascii)
{
    int sizeNeeded = MultiByteToWideChar(CP_UTF8, 0, ascii, -1, NULL, 0);

    if (sizeNeeded < 0) TRACELOG(LOG_ERROR, "WIN32: Failed to calculate wide length [ERROR: %u]", GetLastError());

    return sizeNeeded;
}

// Copy ASCII to WCHAR string
static void AToWCopy(const char *ascii, wchar_t *outPtr, size_t outLen)
{
    int size = MultiByteToWideChar(CP_UTF8, 0, ascii, -1, outPtr, (int)outLen);
    if (size != outLen) TRACELOG(LOG_WARNING, "WIN32: Failed to convert %i UTF-8 chars to WCHAR, converted %i chars", outLen, size);
}

static bool DecoratedFromStyle(DWORD style)
{
    if (style & STYLE_FLAGS_UNDECORATED_ON)
    {
        if (style & STYLE_FLAGS_UNDECORATED_OFF) TRACELOG(LOG_ERROR, "WIN32: FLAGS: Style 0x%x has both undecorated on/off flags", style);
        return false; // Not decorated
    }

    DWORD masked = (style & STYLE_FLAGS_UNDECORATED_OFF);
    if (STYLE_FLAGS_UNDECORATED_OFF != masked) TRACELOG(LOG_ERROR, "WIN32: FLAGS: Style 0x%x is missing flags 0x%x", masked, masked ^ STYLE_FLAGS_UNDECORATED_OFF);

    return true; // Decorated
}

// Get window style from required flags
static DWORD MakeWindowStyle(unsigned flags)
{
    // We don't need this since we don't have any child windows, but I guess
    // it improves efficiency, plus, windows adds this flag automatically anyway
    // so it keeps our flags in sync with the OS
    DWORD style = WS_CLIPSIBLINGS;

    style |= (flags & FLAG_WINDOW_HIDDEN)? 0 : WS_VISIBLE;
    style |= (flags & FLAG_WINDOW_RESIZABLE)? STYLE_FLAGS_RESIZABLE : 0;
    style |= (flags & FLAG_WINDOW_UNDECORATED)? STYLE_FLAGS_UNDECORATED_ON : STYLE_FLAGS_UNDECORATED_OFF;

    // Minimized takes precedence over maximized
    int mized = MIZED_NONE;
    if (FLAG_IS_SET(flags, FLAG_WINDOW_MINIMIZED)) mized = MIZED_MIN;
    if (flags & FLAG_WINDOW_MAXIMIZED) mized = MIZED_MAX;

    switch (mized)
    {
        case MIZED_NONE: break;
        case MIZED_MIN: style |= WS_MINIMIZE; break;
        case MIZED_MAX: style |= WS_MAXIMIZE; break;
        default: break;
    }

    return style;
}

// Check flags state, enforces that the actual window/platform state is in sync with raylib's flags
static void CheckFlags(const char *context, HWND hwnd, DWORD flags, DWORD expectedStyle, DWORD styleCheckMask)
{
    DWORD styleFromFlags = MakeWindowStyle(flags);
    if ((styleFromFlags & styleCheckMask) != (expectedStyle & styleCheckMask))
    {
        TRACELOG(LOG_ERROR, "WIN32: FLAGS: %s: window flags (0x%x) produced style 0x%x which != expected 0x%x (diff=0x%x, mask=0x%x)",
            context, flags, styleFromFlags & styleCheckMask, expectedStyle & styleCheckMask,
            (styleFromFlags & styleCheckMask) ^ (expectedStyle & styleCheckMask), styleCheckMask);
    }

    SetLastError(0);
    LONG actualStyle = (LONG)GetWindowLongPtrW(hwnd, GWL_STYLE);
    if ((actualStyle & styleCheckMask) != (expectedStyle & styleCheckMask))
    {
        TRACELOG(LOG_ERROR, "WIN32: FLAGS: %s: expected style 0x%x but got 0x%x (diff=0x%x, mask=0x%x, lasterror=%lu)",
            context, expectedStyle & styleCheckMask, actualStyle & styleCheckMask,
            (expectedStyle & styleCheckMask) ^ (actualStyle & styleCheckMask),
            styleCheckMask, GetLastError());
    }

    if (styleCheckMask & WS_MINIMIZE)
    {
        bool isIconic = IsIconic(hwnd);
        bool styleMinimized = !!(WS_MINIMIZE & actualStyle);
        if (isIconic != styleMinimized) TRACELOG(LOG_ERROR, "WIN32: FLAGS: IsIconic(%d) != WS_MINIMIZED(%d)", isIconic, styleMinimized);
    }

    if (styleCheckMask & WS_MAXIMIZE)
    {
        WINDOWPLACEMENT placement;
        placement.length = sizeof(placement);
        if (!GetWindowPlacement(hwnd, &placement))
        {
            TRACELOG(LOG_ERROR, "WIN32: FLAGS: %s failed, error=%lu", "GetWindowPlacement", GetLastError());
        }
        bool placementMaximized = (placement.showCmd == SW_SHOWMAXIMIZED);
        bool styleMaximized = WS_MAXIMIZE & actualStyle;
        if (placementMaximized != styleMaximized)
        {
            TRACELOG(LOG_ERROR, "WIN32: FLAGS: Maximized state desync, placement maximized=%d (showCmd=%lu) style maximized=%d",
                placementMaximized, placement.showCmd, styleMaximized);
        }
    }
}

// Calculate window size (with borders, title-bar...) from desired client size (framebuffer size)
static SIZE CalcWindowSize(UINT dpi, SIZE clientSize, DWORD style)
{
    RECT rect = { 0, 0, clientSize.cx, clientSize.cy };

    int result = AdjustWindowRectExForDpi(&rect, style, 0, WINDOW_STYLE_EX, dpi);
    if (result == 0) TRACELOG(LOG_ERROR, "WIN32: Failed to adjust window rect [ERROR: %lu]", GetLastError());

    return (SIZE){ rect.right - rect.left, rect.bottom - rect.top };
}

// Update window size if required
// NOTE: Returns true if the window size was updated, false otherwise
static bool UpdateWindowSize(int mode, HWND hwnd, int width, int height, unsigned flags)
{
    if (flags & FLAG_WINDOW_MINIMIZED) return false;

    if (flags & FLAG_WINDOW_MAXIMIZED)
    {
        CheckFlags("UpdateWindowSize(maximized)", hwnd, flags, MakeWindowStyle(flags), STYLE_MASK_ALL);
        return false;
    }

    if (flags & FLAG_BORDERLESS_WINDOWED_MODE)
    {
        MONITORINFO info = { 0 };
        HMONITOR monitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTOPRIMARY);
        info.cbSize = sizeof(info);
        if (!GetMonitorInfoW(monitor, &info)) TRACELOG(LOG_ERROR, "WIN32: Failed to get monitor info [ERROR: %lu]", GetLastError());

        RECT windowRect = { 0 };
        if (!GetWindowRect(hwnd, &windowRect)) TRACELOG(LOG_ERROR, "WIN32: Failed to get window rect [ERROR: %lu]", GetLastError());

        if ((windowRect.left == info.rcMonitor.left) &&
            (windowRect.top == info.rcMonitor.top) &&
            ((windowRect.right - windowRect.left) == (info.rcMonitor.right - info.rcMonitor.left)) &&
            ((windowRect.bottom - windowRect.top) == (info.rcMonitor.bottom - info.rcMonitor.top))) return false;

        if (!SetWindowPos(hwnd, HWND_TOP,
            info.rcMonitor.left, info.rcMonitor.top,
            info.rcMonitor.right - info.rcMonitor.left,
            info.rcMonitor.bottom - info.rcMonitor.top,
            SWP_NOOWNERZORDER))
        {
            TRACELOG(LOG_ERROR, "WIN32: Failed to set window position [ERROR: %lu]", GetLastError());
        }

        return true;
    }

    // Get size in pixels from points, considering high-dpi
    UINT dpi = GetDpiForWindow(hwnd);
    float dpiScale = ((float)dpi)/96.0f;
    bool dpiScaling = flags & FLAG_WINDOW_HIGHDPI;
    SIZE desiredSize = {
        .cx = dpiScaling? (int)((float)width*dpiScale) : width,
        .cy = dpiScaling? (int)((float)height*dpiScale) : height
    };

    // Get client size (framebuffer inside the window)
    RECT rect = { 0 };
    GetClientRect(hwnd, &rect);
    SIZE clientSize = { rect.right, rect.bottom };

    // If client size is alread desired size, no need to update
    if ((clientSize.cx == desiredSize.cx) || (clientSize.cy == desiredSize.cy)) return false;

    TRACELOG(LOG_INFO, "WIN32: Restoring client size from [%dx%d] to [%dx%d] (dpi:%lu dpiScaling:%d app:%ix%i)",
        clientSize.cx, clientSize.cy, desiredSize.cx, desiredSize.cy, dpi, dpiScaling, width, height);

    // Calculate window size from desired framebuffer size and window flags
    SIZE windowSize = CalcWindowSize(dpi, desiredSize, MakeWindowStyle(flags));
    POINT windowPos = { 0 };
    UINT swpFlags = SWP_NOZORDER | SWP_FRAMECHANGED;

    if (mode == 0) // UPDATE_WINDOW_FIRST
    {
        HMONITOR monitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTOPRIMARY);
        if (!monitor) TRACELOG(LOG_ERROR, "WIN32: Failed to get monitor from window [ERROR: %lu]", GetLastError());

        MONITORINFO info = { 0 };
        info.cbSize = sizeof(info);
        if (!GetMonitorInfoW(monitor, &info)) TRACELOG(LOG_ERROR, "WIN32: Failed to get monitor info [ERROR: %lu]", GetLastError());

        #define MAX(a,b) (((a)>(b))? (a):(b))

        LONG monitorWidth = info.rcMonitor.right - info.rcMonitor.left;
        LONG monitorHeight = info.rcMonitor.bottom - info.rcMonitor.top;
        windowPos = (POINT){
            MAX(0, (monitorWidth - windowSize.cx)/2),
            MAX(0, (monitorHeight - windowSize.cy)/2),
        };
    }
    else swpFlags |= SWP_NOMOVE;

    // WARNING: This code must be called after swInit() has been called, after InitPlatform() in [rcore]
    //RECT rc = {0, 0, desired.cx, desired.cy};
    //AdjustWindowRectEx(&rc, WS_OVERLAPPEDWINDOW, FALSE, 0);
    //SetWindowPos(hwnd, NULL, windowPos.x, windowPos.y, rc.right - rc.left, rc.bottom - rc.top, SWP_NOMOVE | SWP_NOZORDER);

    return true;
}

// Verify if we are running in Windows 10 version 1703 (Creators Update)
static BOOL IsWindows10Version1703OrGreaterWin32(void)
{
    HMODULE ntdll = LoadLibraryW(L"ntdll.dll");

    DWORD (*Verify)(RTL_OSVERSIONINFOEXW*, ULONG, ULONGLONG) =
        (DWORD (*)(RTL_OSVERSIONINFOEXW*, ULONG, ULONGLONG))GetProcAddress(ntdll, "RtlVerifyVersionInfo");
    if (!Verify)
    {
        TRACELOG(LOG_ERROR, "WIN32: Failed to verify Windows version [ERROR: %lu]", GetLastError());
        return 0;
    }

    RTL_OSVERSIONINFOEXW osvi = { 0 };
    osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
    osvi.dwMajorVersion = 10;
    osvi.dwMinorVersion = 0;
    osvi.dwBuildNumber = 15063;  // Build 15063 corresponds to Windows 10 version 1703 (Creators Update)

    DWORDLONG cond = 0;
    VER_SET_CONDITION(cond, VER_MAJORVERSION, VER_GREATER_EQUAL);
    VER_SET_CONDITION(cond, VER_MINORVERSION, VER_GREATER_EQUAL);
    VER_SET_CONDITION(cond, VER_BUILDNUMBER, VER_GREATER_EQUAL);

    return 0 == (*Verify)(&osvi, VER_MAJORVERSION | VER_MINORVERSION | VER_BUILDNUMBER, cond);
}

// Get OpenGL function pointers
static void *WglGetProcAddress(const char *procname)
{
    void *proc = (void *)wglGetProcAddress(procname);

    if ((proc == NULL) ||
        // NOTE: Some GPU drivers could return following
        // invalid sentinel values instead of NULL
        (proc == (void *)0x1) ||
        (proc == (void *)0x2) ||
        (proc == (void *)0x3) ||
        (proc == (void *)-1))
    {
        // TODO: Keep gl module pointer as global platform data?
        HMODULE glModule = LoadLibraryW(L"opengl32.dll");
        proc = (void *)GetProcAddress(glModule, procname);

        //if (proc == NULL) TRACELOG(LOG_ERROR, "GL: GetProcAddress() failed to get %s [%p], error=%u", procname, proc, GetLastError());
        //else TRACELOG(LOG_INFO, "GL: Found entry point for %s [%p]", procname, proc);
    }

    return proc;
}

// Get key from wparam (mapping)
static KeyboardKey GetKeyFromWparam(WPARAM wparam)
{
    switch (wparam)
    {
        /* case VK_LBUTTON: return KEY_; */
        /* case VK_RBUTTON: return KEY_; */
        /* case VK_CANCEL: return KEY_; */
        /* case VK_MBUTTON: return KEY_; */
        /* case VK_XBUTTON1: return KEY_; */
        /* case VK_XBUTTON2: return KEY_; */
        /* case VK_BACK: return KEY_; */
        /* case VK_TAB: return KEY_; */
        /* case VK_CLEAR: return KEY_; */
        case VK_RETURN: return KEY_ENTER;
        /* case VK_SHIFT: return KEY_; */
        /* case VK_CONTROL: return KEY_; */
        /* case VK_MENU: return KEY_; */
        /* case VK_PAUSE: return KEY_; */
        /* case VK_CAPITAL: return KEY_; */
        /* case VK_KANA: return KEY_; */
        /* case VK_HANGUL: return KEY_; */
        /* case VK_IME_ON: return KEY_; */
        /* case VK_JUNJA: return KEY_; */
        /* case VK_FINAL: return KEY_; */
        /* case VK_HANJA: return KEY_; */
        /* case VK_KANJI: return KEY_; */
        /* case VK_IME_OFF: return KEY_; */
        case VK_ESCAPE: return KEY_ESCAPE;
        /* case VK_CONVERT: return KEY_; */
        /* case VK_NONCONVERT: return KEY_; */
        /* case VK_ACCEPT: return KEY_; */
        /* case VK_MODECHANGE: return KEY_; */
        case VK_SPACE: return KEY_SPACE;
        /* case VK_PRIOR: return KEY_; */
        /* case VK_NEXT: return KEY_; */
        /* case VK_END: return KEY_; */
        /* case VK_HOME: return KEY_; */
        case VK_LEFT: return KEY_LEFT;
        case VK_UP: return KEY_UP;
        case VK_RIGHT: return KEY_RIGHT;
        case VK_DOWN: return KEY_DOWN;
        /* case VK_SELECT: return KEY_; */
        /* case VK_PRINT: return KEY_; */
        /* case VK_EXECUTE: return KEY_; */
        /* case VK_SNAPSHOT: return KEY_; */
        /* case VK_INSERT: return KEY_; */
        /* case VK_DELETE: return KEY_; */
        /* case VK_HELP: return KEY_; */
        case '0': return KEY_ZERO;
        case '1': return KEY_ONE;
        case '2': return KEY_TWO;
        case '3': return KEY_THREE;
        case '4': return KEY_FOUR;
        case '5': return KEY_FIVE;
        case '6': return KEY_SIX;
        case '7': return KEY_SEVEN;
        case '8': return KEY_EIGHT;
        case '9': return KEY_NINE;
        /* case 0x3A-40: return KEY_; */
        case 'A': return KEY_A;
        case 'B': return KEY_B;
        case 'C': return KEY_C;
        case 'D': return KEY_D;
        case 'E': return KEY_E;
        case 'F': return KEY_F;
        case 'G': return KEY_G;
        case 'H': return KEY_H;
        case 'I': return KEY_I;
        case 'J': return KEY_J;
        case 'K': return KEY_K;
        case 'L': return KEY_L;
        case 'M': return KEY_M;
        case 'N': return KEY_N;
        case 'O': return KEY_O;
        case 'P': return KEY_P;
        case 'Q': return KEY_Q;
        case 'R': return KEY_R;
        case 'S': return KEY_S;
        case 'T': return KEY_T;
        case 'U': return KEY_U;
        case 'V': return KEY_V;
        case 'W': return KEY_W;
        case 'X': return KEY_X;
        case 'Y': return KEY_Y;
        case 'Z': return KEY_Z;
        /* case VK_LWIN: return KEY_; */
        /* case VK_RWIN: return KEY_; */
        /* case VK_APPS: return KEY_; */
        /* case VK_SLEEP: return KEY_; */
        /* case VK_NUMPAD0: return KEY_; */
        /* case VK_NUMPAD1: return KEY_; */
        /* case VK_NUMPAD2: return KEY_; */
        /* case VK_NUMPAD3: return KEY_; */
        /* case VK_NUMPAD4: return KEY_; */
        /* case VK_NUMPAD5: return KEY_; */
        /* case VK_NUMPAD6: return KEY_; */
        /* case VK_NUMPAD7: return KEY_; */
        /* case VK_NUMPAD8: return KEY_; */
        /* case VK_NUMPAD9: return KEY_; */
        /* case VK_MULTIPLY: return KEY_; */
        /* case VK_ADD: return KEY_; */
        /* case VK_SEPARATOR: return KEY_; */
        /* case VK_SUBTRACT: return KEY_; */
        /* case VK_DECIMAL: return KEY_; */
        /* case VK_DIVIDE: return KEY_; */
        /* case VK_F1: return KEY_; */
        /* case VK_F2: return KEY_; */
        /* case VK_F3: return KEY_; */
        /* case VK_F4: return KEY_; */
        /* case VK_F5: return KEY_; */
        /* case VK_F6: return KEY_; */
        /* case VK_F7: return KEY_; */
        /* case VK_F8: return KEY_; */
        /* case VK_F9: return KEY_; */
        /* case VK_F10: return KEY_; */
        /* case VK_F11: return KEY_; */
        /* case VK_F12: return KEY_; */
        /* case VK_F13: return KEY_; */
        /* case VK_F14: return KEY_; */
        /* case VK_F15: return KEY_; */
        /* case VK_F16: return KEY_; */
        /* case VK_F17: return KEY_; */
        /* case VK_F18: return KEY_; */
        /* case VK_F19: return KEY_; */
        /* case VK_F20: return KEY_; */
        /* case VK_F21: return KEY_; */
        /* case VK_F22: return KEY_; */
        /* case VK_F23: return KEY_; */
        /* case VK_F24: return KEY_; */
        /* case VK_NUMLOCK: return KEY_; */
        /* case VK_SCROLL: return KEY_; */
        /* case VK_LSHIFT: return KEY_; */
        /* case VK_RSHIFT: return KEY_; */
        /* case VK_LCONTROL: return KEY_; */
        /* case VK_RCONTROL: return KEY_; */
        /* case VK_LMENU: return KEY_; */
        /* case VK_RMENU: return KEY_; */
        /* case VK_BROWSER_BACK: return KEY_; */
        /* case VK_BROWSER_FORWARD: return KEY_; */
        /* case VK_BROWSER_REFRESH: return KEY_; */
        /* case VK_BROWSER_STOP: return KEY_; */
        /* case VK_BROWSER_SEARCH: return KEY_; */
        /* case VK_BROWSER_FAVORITES: return KEY_; */
        /* case VK_BROWSER_HOME: return KEY_; */
        /* case VK_VOLUME_MUTE: return KEY_; */
        /* case VK_VOLUME_DOWN: return KEY_; */
        /* case VK_VOLUME_UP: return KEY_; */
        /* case VK_MEDIA_NEXT_TRACK: return KEY_; */
        /* case VK_MEDIA_PREV_TRACK: return KEY_; */
        /* case VK_MEDIA_STOP: return KEY_; */
        /* case VK_MEDIA_PLAY_PAUSE: return KEY_; */
        /* case VK_LAUNCH_MAIL: return KEY_; */
        /* case VK_LAUNCH_MEDIA_SELECT: return KEY_; */
        /* case VK_LAUNCH_APP1: return KEY_; */
        /* case VK_LAUNCH_APP2: return KEY_; */
        /* case VK_OEM_1: return KEY_; */
        /* case VK_OEM_PLUS: return KEY_; */
        /* case VK_OEM_COMMA: return KEY_; */
        /* case VK_OEM_MINUS: return KEY_; */
        /* case VK_OEM_PERIOD: return KEY_; */
        /* case VK_OEM_2: return KEY_; */
        /* case VK_OEM_3: return KEY_; */
        /* case VK_OEM_4: return KEY_; */
        /* case VK_OEM_5: return KEY_; */
        /* case VK_OEM_6: return KEY_; */
        /* case VK_OEM_7: return KEY_; */
        /* case VK_OEM_8: return KEY_; */
        /* case VK_OEM_102: return KEY_; */
        /* case VK_PROCESSKEY: return KEY_; */
        /* case VK_PACKET: return KEY_; */
        /* case VK_ATTN: return KEY_; */
        /* case VK_CRSEL: return KEY_; */
        /* case VK_EXSEL: return KEY_; */
        /* case VK_EREOF: return KEY_; */
        /* case VK_PLAY: return KEY_; */
        /* case VK_ZOOM: return KEY_; */
        /* case VK_NONAME: return KEY_; */
        /* case VK_PA1: return KEY_; */
        /* case VK_OEM_CLEAR: return KEY_; */
        default: return KEY_NULL;
    }
}

// Get cursor name
static LPCWSTR GetCursorName(int cursor)
{
    LPCWSTR name = (LPCWSTR)IDC_ARROW;

    switch (cursor)
    {
        case MOUSE_CURSOR_DEFAULT: name = (LPCWSTR)IDC_ARROW; break;
        case MOUSE_CURSOR_ARROW: name = (LPCWSTR)IDC_ARROW; break;
        case MOUSE_CURSOR_IBEAM: name = (LPCWSTR)IDC_IBEAM; break;
        case MOUSE_CURSOR_CROSSHAIR: name = (LPCWSTR)IDC_CROSS; break;
        case MOUSE_CURSOR_POINTING_HAND: name = (LPCWSTR)IDC_HAND; break;
        case MOUSE_CURSOR_RESIZE_EW: name = (LPCWSTR)IDC_SIZEWE; break;
        case MOUSE_CURSOR_RESIZE_NS: name = (LPCWSTR)IDC_SIZENS; break;
        case MOUSE_CURSOR_RESIZE_NWSE: name = (LPCWSTR)IDC_SIZENWSE; break;
        case MOUSE_CURSOR_RESIZE_NESW: name = (LPCWSTR)IDC_SIZENESW; break;
        case MOUSE_CURSOR_RESIZE_ALL: name = (LPCWSTR)IDC_SIZEALL; break;
        case MOUSE_CURSOR_NOT_ALLOWED: name = (LPCWSTR)IDC_NO; break;
        default: break;
    }

    return name;
}

// Count monitors process
// NOTE: Required by GetMonitorCount()
static BOOL CALLBACK CountMonitorsProc(HMONITOR handle, HDC hdc, LPRECT rect, LPARAM lparam)
{
    int *count = (int *)lparam;
    *count += 1;

    // Always return TRUE to continue the loop, otherwise, the caller
    // can't distinguish between stopping the loop and an error
    return TRUE;
}

// Find monitor process
// NOTE: Required by GetCurrentMonitor()
static BOOL CALLBACK FindMonitorProc(HMONITOR handle, HDC hdc, LPRECT rect, LPARAM lparam)
{
    MonitorInfo *monitor = (MonitorInfo *)lparam;

    if (handle == monitor->needle)
    {
        monitor->matchIndex = monitor->index;
        monitor->rect = *rect;
    }

    monitor->index += 1;

    // Always return TRUE to continue the loop, otherwise, the caller
    // can't distinguish between stopping the loop and an error
    return TRUE;
}

// Get style changed required operations flags
// NOTE: Required for deferred operations
static void GetStyleChangeFlagOps(DWORD coreWindowFlags, STYLESTRUCT *style, FlagsOp *deferredFlags)
{
    // Check window resizable flag change
    bool resizable = (coreWindowFlags & FLAG_WINDOW_RESIZABLE);
    bool resizableOld = ((style->styleOld & STYLE_FLAGS_RESIZABLE) != 0);
    bool resizableNew = ((style->styleNew & STYLE_FLAGS_RESIZABLE) != 0);
    if (resizable != resizableOld) TRACELOG(LOG_ERROR, "WIN32: Expected resizable %u but got %u", resizable, resizableOld);
    if (resizableOld != resizableNew)
    {
        if (resizableNew) deferredFlags->set |= FLAG_WINDOW_RESIZABLE;
        else deferredFlags->clear |= FLAG_WINDOW_RESIZABLE;
    }

    // Check window decorated flag change
    bool decorated = (0 == (coreWindowFlags & FLAG_WINDOW_UNDECORATED));
    bool decoratedOld = DecoratedFromStyle(style->styleOld);
    bool decoratedNew = DecoratedFromStyle(style->styleNew);
    if (decorated != decoratedOld) TRACELOG(LOG_ERROR, "WIN32: Expected decorated %u but got %u", decorated, decoratedOld);
    if (decoratedOld != decoratedNew)
    {
        if (decoratedNew) deferredFlags->clear |= FLAG_WINDOW_UNDECORATED;
        else deferredFlags->set |= FLAG_WINDOW_UNDECORATED;
    }

    // Check window hidden flag change
    bool hidden = (coreWindowFlags & FLAG_WINDOW_HIDDEN);
    bool hiddenOld = ((style->styleOld & WS_VISIBLE) == 0);
    bool hiddenNew = ((style->styleNew & WS_VISIBLE) == 0);
    if (hidden != hiddenOld) TRACELOG(LOG_ERROR, "WIN32: Expected hidden %u but got %u", hidden, hiddenOld);
    if (hiddenOld != hiddenNew)
    {
        if (hiddenNew) deferredFlags->set |= FLAG_WINDOW_HIDDEN;
        else deferredFlags->clear |= FLAG_WINDOW_HIDDEN;
    }
}

// Adopt window resize
// NOTE: Call when the window is rezised, returns true
// if the new window size should update the desired app size
static bool AdoptWindowResize(unsigned flags)
{
    if (flags & FLAG_WINDOW_MINIMIZED) return false;
    if (flags & FLAG_WINDOW_MAXIMIZED) return false;
    if (flags & FLAG_FULLSCREEN_MODE) return false;
    if (flags & FLAG_BORDERLESS_WINDOWED_MODE) return false;
    if (!(flags & FLAG_WINDOW_RESIZABLE)) return false;

    return true;
}

// ---------------------------------------------------------------------------------------------
// Here's the end of the "pure function section", the rest of the file can access global state
// ---------------------------------------------------------------------------------------------

// Unlock the ability to use CORE in the rest of the file
#undef CORE

//----------------------------------------------------------------------------------
// Module Internal Functions Declaration
//----------------------------------------------------------------------------------
int InitPlatform(void);             // Initialize platform (graphics, inputs and more)
void ClosePlatform(void);           // Close platform

// Win32 process messages management function
static LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam);

// Win32: Handle inputs functions
static void HandleKey(WPARAM wparam, LPARAM lparam, char state);
static void HandleMouseButton(int button, char state);
static void HandleRawInput(LPARAM lparam);
static void HandleWindowResize(HWND hwnd, int *width, int *height);

static void UpdateWindowStyle(HWND hwnd, unsigned desiredFlags);
static unsigned SanitizeFlags(int mode, unsigned flags);
static void UpdateFlags(HWND hwnd, unsigned desiredFlags, int width, int height); // Update window flags

// Check if OpenGL extension is available
static bool IsWglExtensionAvailable(HDC hdc, const char *extension);

//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
// NOTE: Functions declaration is provided by raylib.h

//----------------------------------------------------------------------------------
// Module Functions Definition: Window and Graphics Device
//----------------------------------------------------------------------------------

// Check if application should close
bool WindowShouldClose(void)
{
    return CORE.Window.shouldClose;
}

// Toggle fullscreen mode
void ToggleFullscreen(void)
{
    TRACELOG(LOG_WARNING, "WIN32: Toggle full screen functionality not implemented");
}

// Toggle borderless windowed mode
void ToggleBorderlessWindowed(void)
{
    if (CORE.Window.flags & FLAG_BORDERLESS_WINDOWED_MODE) ClearWindowState(FLAG_BORDERLESS_WINDOWED_MODE);
    else SetWindowState(FLAG_BORDERLESS_WINDOWED_MODE);
}

// Set window state: maximized, if resizable
void MaximizeWindow(void)
{
    SetWindowState(FLAG_WINDOW_MAXIMIZED);
}

// Set window state: minimized
void MinimizeWindow(void)
{
    SetWindowState(FLAG_WINDOW_MINIMIZED);
}

// Restore window from being minimized/maximized
void RestoreWindow(void)
{
    if ((CORE.Window.flags & FLAG_WINDOW_MAXIMIZED) &&
        (CORE.Window.flags & FLAG_WINDOW_MINIMIZED)) ClearWindowState(FLAG_WINDOW_MINIMIZED);
    else ClearWindowState(FLAG_WINDOW_MINIMIZED | FLAG_WINDOW_MAXIMIZED);
}

// Set window configuration state using flags
void SetWindowState(unsigned int flags)
{
    platform.desiredFlags = SanitizeFlags(1 /*SANITIZE_FLAGS_NORMAL*/, CORE.Window.flags | flags);
    UpdateFlags(platform.hwnd, platform.desiredFlags, platform.appScreenWidth, platform.appScreenHeight);
}

// Clear window configuration state flags
void ClearWindowState(unsigned int flags)
{
    platform.desiredFlags = SanitizeFlags(1 /*SANITIZE_FLAGS_NORMAL*/, CORE.Window.flags & ~flags);
    UpdateFlags(platform.hwnd, platform.desiredFlags, platform.appScreenWidth, platform.appScreenHeight);
}

// Set icon for window
void SetWindowIcon(Image image)
{
    if (!platform.hwnd || (image.data == NULL) || (image.width <= 0) || (image.height <= 0)) return;

    HDC hdc = GetDC(platform.hwnd);

    // Create 32-bit BGRA DIB for color
    BITMAPV5HEADER bi = { 0 };
    ZeroMemory(&bi, sizeof(bi));
    bi.bV5Size = sizeof(bi);
    bi.bV5Width = image.width;
    bi.bV5Height = -image.height; // Negative = top-down bitmap
    bi.bV5Planes = 1;
    bi.bV5BitCount = 32;
    bi.bV5Compression = BI_BITFIELDS;
    bi.bV5RedMask = 0x00FF0000;
    bi.bV5GreenMask = 0x0000FF00;
    bi.bV5BlueMask = 0x000000FF;
    bi.bV5AlphaMask = 0xFF000000;

    unsigned char *targetBits = NULL;
    HBITMAP hColorBitmap = CreateDIBSection(hdc, (BITMAPINFO *)&bi, DIB_RGB_COLORS, (void **)&targetBits, NULL, 0);
    if (!hColorBitmap)
    {
        ReleaseDC(platform.hwnd, hdc);
        return;
    }

    // Copy RGBA > BGRA (Win32 expects BGRA)
    for (int y = 0; y < image.height; y++)
    {
        for (int x = 0; x < image.width; x++)
        {
            int i = (y*image.width + x)*4;
            targetBits[i + 0] = ((unsigned char *)image.data)[i + 2]; // B
            targetBits[i + 1] = ((unsigned char *)image.data)[i + 1]; // G
            targetBits[i + 2] = ((unsigned char *)image.data)[i + 0]; // R
            targetBits[i + 3] = ((unsigned char *)image.data)[i + 3]; // A
        }
    }

    // Create mask bitmap (1-bit, all opaque)
    HBITMAP hMaskBitmap = CreateBitmap(image.width, image.height, 1, 1, NULL);

    // Build icon info
    ICONINFO ii = { 0 };
    ZeroMemory(&ii, sizeof(ii));
    ii.fIcon = TRUE;
    ii.hbmMask = hMaskBitmap;
    ii.hbmColor = hColorBitmap;

    HICON hIcon = CreateIconIndirect(&ii);

    // Clean up GDI bitmaps (icon keeps copies internally)
    DeleteObject(hColorBitmap);
    DeleteObject(hMaskBitmap);
    ReleaseDC(platform.hwnd, hdc);

    if (hIcon)
    {
        // Set both large and small icons
        SendMessage(platform.hwnd, WM_SETICON, ICON_BIG, (LPARAM)hIcon);
        SendMessage(platform.hwnd, WM_SETICON, ICON_SMALL, (LPARAM)hIcon);
    }
}

// Set icon for window
void SetWindowIcons(Image *images, int count)
{
    // TODO.
}

void SetWindowTitle(const char *title)
{
    CORE.Window.title = title;

    WCHAR *titleWide = NULL;
    A_TO_W_ALLOCA(titleWide, CORE.Window.title);

    int result = SetWindowTextW(platform.hwnd, titleWide);
    if (result == 0) TRACELOG(LOG_WARNING, "WIN32: Failed to set window title [ERROR: %lu]", GetLastError());
}

// Set window position on screen (windowed mode)
void SetWindowPosition(int x, int y)
{
    if (platform.hwnd != NULL)
    {
        RECT rect = { 0 };
        if (GetWindowRect(platform.hwnd, &rect))
        {
            int width = rect.right - rect.left;
            int height = rect.bottom - rect.top;

            // Move the window to the new position (keeping size and z-order)
            SetWindowPos(platform.hwnd, NULL, x, y, width, height, SWP_NOZORDER | SWP_NOACTIVATE);
        }
    }
}

// Set monitor for the current window
void SetWindowMonitor(int monitor)
{
    TRACELOG(LOG_WARNING, "SetWindowMonitor not implemented");
}

// Set window minimum dimensions (FLAG_WINDOW_RESIZABLE)
void SetWindowMinSize(int width, int height)
{
    TRACELOG(LOG_WARNING, "SetWindowMinSize not implemented");

    CORE.Window.screenMin.width = width;
    CORE.Window.screenMin.height = height;
}

// Set window maximum dimensions (FLAG_WINDOW_RESIZABLE)
void SetWindowMaxSize(int width, int height)
{
    TRACELOG(LOG_WARNING, "SetWindowMaxSize not implemented");

    CORE.Window.screenMax.width = width;
    CORE.Window.screenMax.height = height;
}

// Set window dimensions
void SetWindowSize(int width, int height)
{
    TRACELOG(LOG_WARNING, "SetWindowSize not implemented");
}

// Set window opacity, value opacity is between 0.0 and 1.0
void SetWindowOpacity(float opacity)
{
    TRACELOG(LOG_WARNING, "SetWindowOpacity not implemented");
}

// Set window focused
void SetWindowFocused(void)
{
    TRACELOG(LOG_WARNING, "SetWindowFocused not implemented");
}

// Get native window handle
void *GetWindowHandle(void)
{
    return platform.hwnd;
}

int GetMonitorCount(void)
{
    int count = 0;

    int result = EnumDisplayMonitors(NULL, NULL, CountMonitorsProc, (LPARAM)&count);
    if (result == 0) TRACELOG(LOG_ERROR, "%s failed, error=%lu", "EnumDisplayMonitors", GetLastError());

    return count;
}

// Get current monitor where window is placed
int GetCurrentMonitor(void)
{
    HMONITOR monitor = MonitorFromWindow(platform.hwnd, MONITOR_DEFAULTTOPRIMARY);
    if (!monitor) TRACELOG(LOG_ERROR, "%s failed, error=%lu", "MonitorFromWindow", GetLastError());

    MonitorInfo info = { 0 };
    info.needle = monitor;
    info.index = 0;
    info.matchIndex = -1;

    int result = EnumDisplayMonitors(NULL, NULL, FindMonitorProc, (LPARAM)&info);
    if (result == 0) TRACELOG(LOG_ERROR, "%s failed, error=%lu", "EnumDisplayMonitors", GetLastError());

    return info.matchIndex;
}

// Get selected monitor position
Vector2 GetMonitorPosition(int monitor)
{
    TRACELOG(LOG_WARNING, "GetMonitorPosition not implemented");
    return (Vector2){ 0, 0 };
}

// Get selected monitor width (currently used by monitor)
int GetMonitorWidth(int monitor)
{
    TRACELOG(LOG_WARNING, "GetMonitorWidth not implemented");
    return 0;
}

// Get selected monitor height (currently used by monitor)
int GetMonitorHeight(int monitor)
{
    TRACELOG(LOG_WARNING, "GetMonitorHeight not implemented");
    return 0;
}

// Get selected monitor physical width in millimetres
int GetMonitorPhysicalWidth(int monitor)
{
    TRACELOG(LOG_WARNING, "GetMonitorPhysicalWidth not implemented");
    return 0;
}

// Get selected monitor physical height in millimetres
int GetMonitorPhysicalHeight(int monitor)
{
    TRACELOG(LOG_WARNING, "GetMonitorPhysicalHeight not implemented");
    return 0;
}

// Get selected monitor refresh rate
int GetMonitorRefreshRate(int monitor)
{
    TRACELOG(LOG_WARNING, "GetMonitorRefreshRate not implemented");
    return 0;
}

// Get the human-readable, UTF-8 encoded name of the selected monitor
const char *GetMonitorName(int monitor)
{
    TRACELOG(LOG_WARNING, "GetMonitorName not implemented");
    return 0;
}

// Get window position XY on monitor
Vector2 GetWindowPosition(void)
{
    TRACELOG(LOG_WARNING, "GetWindowPosition not implemented");
    return (Vector2){ 0, 0 };
}

// Get window scale DPI factor for current monitor
Vector2 GetWindowScaleDPI(void)
{
    float scale = ((float)GetDpiForWindow(platform.hwnd))/96.0f;
    return (Vector2){ scale, scale };
}

// Set clipboard text content
void SetClipboardText(const char *text)
{
    TRACELOG(LOG_WARNING, "SetClipboardText not implemented");
}

// Get clipboard text content
const char *GetClipboardText(void)
{
    TRACELOG(LOG_WARNING, "GetClipboardText not implemented");
    return NULL;
}

// Get clipboard image
Image GetClipboardImage(void)
{
    Image image = { 0 };

    TRACELOG(LOG_WARNING, "GetClipboardText not implemented");

    return image;
}

// Show mouse cursor
void ShowCursor(void)
{
    SetCursor(LoadCursorW(NULL, (LPCWSTR)IDC_ARROW));
    CORE.Input.Mouse.cursorHidden = false;
}

// Hides mouse cursor
void HideCursor(void)
{
    // NOTE: We use SetCursor() instead of ShowCursor() because
    // it makes it easy to only hide the cursor while it's inside the client area
    SetCursor(NULL);
    CORE.Input.Mouse.cursorHidden = true;
}

// Enables cursor (unlock cursor)
void EnableCursor(void)
{
    if (CORE.Input.Mouse.cursorLocked)
    {
        if (!ClipCursor(NULL)) TRACELOG(LOG_WARNING, "WIN32: Failed to clip cursor [ERROR: %lu]", GetLastError());

        RAWINPUTDEVICE rid = { 0 };
        rid.usUsagePage = 0x01; // HID_USAGE_PAGE_GENERIC
        rid.usUsage = 0x02; // HID_USAGE_GENERIC_MOUSE
        rid.dwFlags = RIDEV_REMOVE; // Add to this window even in background
        rid.hwndTarget = NULL;
        int result = RegisterRawInputDevices(&rid, 1, sizeof(rid));
        if (result == 0) TRACELOG(LOG_WARNING, "WIN32: Failed to register raw input devices [ERROR: %lu]", GetLastError());

        ShowCursor();
        CORE.Input.Mouse.cursorLocked = false;
    }
}

// Disables cursor (lock cursor)
void DisableCursor(void)
{
    if (!CORE.Input.Mouse.cursorLocked)
    {
        RAWINPUTDEVICE rid = { 0 };
        rid.usUsagePage = 0x01; // HID_USAGE_PAGE_GENERIC
        rid.usUsage = 0x02; // HID_USAGE_GENERIC_MOUSE
        rid.dwFlags = RIDEV_INPUTSINK; // Add to this window even in background
        rid.hwndTarget = platform.hwnd;
        int result = RegisterRawInputDevices(&rid, 1, sizeof(rid));
        if (result == 0) TRACELOG(LOG_WARNING, "WIN32: Failed to register raw input devices [ERROR: %lu]", GetLastError());

        RECT clientRect = { 0 };
        if (!GetClientRect(platform.hwnd, &clientRect)) TRACELOG(LOG_WARNING, "WIN32: Failed to get client rectangle [ERROR: %lu]", GetLastError());

        POINT topleft = { clientRect.left, clientRect.top };
        if (!ClientToScreen(platform.hwnd, &topleft)) TRACELOG(LOG_WARNING, "WIN32: Failed to get client to screen size [ERROR: %lu]", GetLastError());

        LONG width = clientRect.right - clientRect.left;
        LONG height = clientRect.bottom - clientRect.top;

        TRACELOG(LOG_INFO, "WIN32: Clip cursor client rect: [%d,%d %d,%d], top-left: (%d,%d)",
            clientRect.left, clientRect.top, clientRect.right, clientRect.bottom, topleft.x, topleft.y);

        LONG centerX = topleft.x + width/2;
        LONG centerY = topleft.y + height/2;
        RECT clipRect = { centerX, centerY, centerX + 1, centerY + 1 };
        if (!ClipCursor(&clipRect)) TRACELOG(LOG_WARNING, "WIN32: Failed to clip cursor [ERROR: %lu]", GetLastError());

        CORE.Input.Mouse.previousPosition = (Vector2){ 0, 0 };
        CORE.Input.Mouse.currentPosition = (Vector2){ 0, 0 };
        HideCursor();

        CORE.Input.Mouse.cursorLocked = true;
    }
}

// Swap back buffer with front buffer (screen drawing)
void SwapScreenBuffer(void)
{
    if (!platform.hdc) abort();

#if defined(GRAPHICS_API_OPENGL_11_SOFTWARE)
    // Update framebuffer
    rlCopyFramebuffer(0, 0, CORE.Window.render.width, CORE.Window.render.height, PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, platform.pixels);

    // Force redraw
    InvalidateRect(platform.hwnd, NULL, FALSE);
    UpdateWindow(platform.hwnd);
#else
    if (!SwapBuffers(platform.hdc)) TRACELOG(LOG_ERROR, "WIN32: Failed to swap buffers [ERROR: %lu]", GetLastError());
    if (!ValidateRect(platform.hwnd, NULL)) TRACELOG(LOG_ERROR, "WIN32: Failed to validate screen rect [ERROR: %lu]", GetLastError());
#endif
}

//----------------------------------------------------------------------------------
// Module Functions Definition: Misc
//----------------------------------------------------------------------------------

// Get elapsed time measure in seconds
double GetTime(void)
{
    LARGE_INTEGER now;
    QueryPerformanceCounter(&now);
    return (double)(now.QuadPart - CORE.Time.base)/(double)platform.timerFrequency.QuadPart;
}

// Open URL with default system browser (if available)
// NOTE: This function is only safe to use if you control the URL given
// A user could craft a malicious string performing another action
// Only call this function yourself not with user input or make sure to check the string yourself
// Ref: https://github.com/raysan5/raylib/issues/686
void OpenURL(const char *url)
{
    // Security check to (partially) avoid malicious code on target platform
    if (strchr(url, '\'') != NULL) TRACELOG(LOG_WARNING, "SYSTEM: Provided URL could be potentially malicious, avoid [\'] character");
    else
    {
        TRACELOG(LOG_WARNING, "OpenURL not implemented");
    }
}

//----------------------------------------------------------------------------------
// Module Functions Definition: Inputs
//----------------------------------------------------------------------------------

// Set internal gamepad mappings
int SetGamepadMappings(const char *mappings)
{
    TRACELOG(LOG_WARNING, "SetGamepadMappings not implemented");

    return -1;
}

// Set gamepad vibration
void SetGamepadVibration(int gamepad, float leftMotor, float rightMotor, float duration)
{
    TRACELOG(LOG_WARNING, "SetGamepadVibration not implemented");
}

// Set mouse position XY
void SetMousePosition(int x, int y)
{
    if (!CORE.Input.Mouse.cursorLocked)
    {
        CORE.Input.Mouse.currentPosition = (Vector2){ (float)x, (float)y };
        CORE.Input.Mouse.previousPosition = CORE.Input.Mouse.currentPosition;
        TRACELOG(LOG_WARNING, "SetMousePosition not implemented");
    }
    else TRACELOG(LOG_WARNING, "INPUT: MOUSE: Cursor not enabled");
}

// Set mouse cursor
void SetMouseCursor(int cursor)
{
    LPCWSTR cursorName = GetCursorName(cursor);
    HCURSOR hcursor = LoadCursorW(NULL, cursorName);
    if (!hcursor) TRACELOG(LOG_ERROR, "WIN32: Failed to load requested cursor [ERROR: %lu]", GetLastError());

    SetCursor(hcursor);
    CORE.Input.Mouse.cursorHidden = false;
}

// Get physical key name
const char *GetKeyName(int key)
{
    TRACELOG(LOG_WARNING, "GetKeyName not implemented");
    return NULL;
}

// Register all input events
void PollInputEvents(void)
{
    // Reset keys/chars pressed registered
    CORE.Input.Keyboard.keyPressedQueueCount = 0;
    CORE.Input.Keyboard.charPressedQueueCount = 0;

    // Reset key repeats
    for (int i = 0; i < MAX_KEYBOARD_KEYS; i++) CORE.Input.Keyboard.keyRepeatInFrame[i] = 0;

    // Reset last gamepad button/axis registered state
    CORE.Input.Gamepad.lastButtonPressed = 0; // GAMEPAD_BUTTON_UNKNOWN
    //CORE.Input.Gamepad.axisCount = 0;

    // Register previous touch states
    for (int i = 0; i < MAX_TOUCH_POINTS; i++) CORE.Input.Touch.previousTouchState[i] = CORE.Input.Touch.currentTouchState[i];

    // Reset touch positions
    // TODO: It resets on target platform the mouse position and not filled again until a move-event,
    // so, if mouse is not moved it returns a (0, 0) position... this behaviour should be reviewed!
    //for (int i = 0; i < MAX_TOUCH_POINTS; i++) CORE.Input.Touch.position[i] = (Vector2){ 0, 0 };

    memcpy(CORE.Input.Keyboard.previousKeyState, CORE.Input.Keyboard.currentKeyState, sizeof(CORE.Input.Keyboard.previousKeyState));
    memset(CORE.Input.Keyboard.keyRepeatInFrame, 0, sizeof(CORE.Input.Keyboard.keyRepeatInFrame));

    // Register previous mouse wheel state
    CORE.Input.Mouse.previousWheelMove = CORE.Input.Mouse.currentWheelMove;
    CORE.Input.Mouse.currentWheelMove = (Vector2){ 0.0f, 0.0f };

    // Register previous mouse position
    CORE.Input.Mouse.previousPosition = CORE.Input.Mouse.currentPosition;

    // Process windows messages
    MSG msg = { 0 };
    while (PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE))
    {
        TranslateMessage(&msg);
        DispatchMessageW(&msg);
    }
}

//----------------------------------------------------------------------------------
// Module Internal Functions Definition
//----------------------------------------------------------------------------------

// Initialize modern OpenGL context
// NOTE: We need to create a dummy context first to query required extensions
HGLRC InitOpenGL(HWND hwnd, HDC hdc)
{
    // First, create a dummy context to get WGL extensions
    PIXELFORMATDESCRIPTOR pixelFormatDesc = {
        .nSize = sizeof(PIXELFORMATDESCRIPTOR),
        .nVersion = 1,
        .dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
        .iPixelType = PFD_TYPE_RGBA,
        .cColorBits = 32,
        .cAlphaBits = 8,
        .cDepthBits = 24,
        .iLayerType = PFD_MAIN_PLANE
    };

    int pixelFormat = ChoosePixelFormat(hdc, &pixelFormatDesc);
    SetPixelFormat(hdc, pixelFormat, &pixelFormatDesc);
    //int pixelFormat = ChoosePixelFormat(platform.hdc, &pixelFormatDesc);
    //if (!pixelFormat) { TRACELOG(LOG_ERROR, "%s failed, error=%lu", "ChoosePixelFormat", GetLastError()); return -1; }
    //if (!SetPixelFormat(platform.hdc, pixelFormat, &pixelFormatDesc)) { TRACELOG(LOG_ERROR, "%s failed, error=%lu", "SetPixelFormat", GetLastError()); return -1; }

    HGLRC tempContext = wglCreateContext(hdc);
    //if (!tempContext) { TRACELOG(LOG_ERROR, "%s failed, error=%lu", "wglCreateContext", GetLastError()); return -1; }
    BOOL result = wglMakeCurrent(hdc, tempContext);
    //if (!result) { TRACELOG(LOG_ERROR, "%s failed, error=%lu", "wglMakeCurrent", GetLastError()); return -1; }

    // Load WGL extension entry points
    wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)wglGetProcAddress("wglCreateContextAttribsARB");
    wglChoosePixelFormatARB = (PFNWGLCHOOSEPIXELFORMATARBPROC)wglGetProcAddress("wglChoosePixelFormatARB");
    wglSwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)wglGetProcAddress("wglSwapIntervalEXT");
    wglGetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB");

    // Setup modern pixel format if extension is available
    if (wglChoosePixelFormatARB)
    {
        int pixelFormatAttribs[] = {
            WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
            WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
            WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
            WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
            WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB,
            WGL_COLOR_BITS_ARB, 32,
            //WGL_RED_BITS_ARB, 8,
            //WGL_GREEN_BITS_ARB, 8,
            //WGL_BLUE_BITS_ARB, 8,
            //WGL_ALPHA_BITS_ARB, 8,
            WGL_DEPTH_BITS_ARB, 24,
            WGL_STENCIL_BITS_ARB, 8,
            0 // Terminator
        };

        int format = 0;
        UINT numFormats = 0;
        if (wglChoosePixelFormatARB(hdc, pixelFormatAttribs, NULL, 1, &format, &numFormats) && (numFormats > 0))
        {
            PIXELFORMATDESCRIPTOR newPixelFormatDescriptor = { 0 };
            DescribePixelFormat(hdc, format, sizeof(newPixelFormatDescriptor), &newPixelFormatDescriptor);
            SetPixelFormat(hdc, format, &newPixelFormatDescriptor);
        }
    }

    // Create real modern OpenGL context (3.3 core)
    HGLRC realContext = NULL;
    if (wglCreateContextAttribsARB)
    {
        int glContextVersionMajor = 1;
        int glContextVersionMinor = 1;
        int glContextProfile = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;

        if (rlGetVersion() == RL_OPENGL_21)         // Request OpenGL 2.1 context
        {
            glContextVersionMajor = 2;
            glContextVersionMinor = 1;
        }
        else if (rlGetVersion() == RL_OPENGL_33)    // Request OpenGL 3.3 context
        {
            glContextVersionMajor = 3;
            glContextVersionMinor = 3;
        }
        else if (rlGetVersion() == RL_OPENGL_43)    // Request OpenGL 4.3 context
        {
            glContextVersionMajor = 4;
            glContextVersionMinor = 3;
        }
        else if (rlGetVersion() == RL_OPENGL_ES_20) // Request OpenGL ES 2.0 context
        {
            if (IsWglExtensionAvailable(platform.hdc, "WGL_EXT_create_context_es_profile") ||
                IsWglExtensionAvailable(platform.hdc, "WGL_EXT_create_context_es2_profile"))
            {
                glContextVersionMajor = 2;
                glContextVersionMinor = 0;
                glContextProfile = WGL_CONTEXT_ES_PROFILE_BIT_EXT;
            }
            else TRACELOG(LOG_WARNING, "GL: OpenGL ES context not supported by GPU");
        }
        else if (rlGetVersion() == RL_OPENGL_ES_30) // Request OpenGL ES 3.0 context
        {
            if (IsWglExtensionAvailable(platform.hdc, "WGL_EXT_create_context_es_profile") ||
                IsWglExtensionAvailable(platform.hdc, "WGL_EXT_create_context_es2_profile"))
            {
                glContextVersionMajor = 3;
                glContextVersionMinor = 0;
                glContextProfile = WGL_CONTEXT_ES_PROFILE_BIT_EXT;
            }
            else TRACELOG(LOG_WARNING, "GL: OpenGL ES context not supported by GPU");
        }

        int contextAttribs[] = {
            WGL_CONTEXT_MAJOR_VERSION_ARB, glContextVersionMajor,
            WGL_CONTEXT_MINOR_VERSION_ARB, glContextVersionMinor,
            WGL_CONTEXT_PROFILE_MASK_ARB, glContextProfile, // WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, WGL_CONTEXT_ES_PROFILE_BIT_EXT (if supported)
            //WGL_CONTEXT_FLAGS_ARB, WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB | WGL_CONTEXT_DEBUG_BIT_ARB [glDebugMessageCallback()]
            0 // Terminator
        };

        // NOTE: We are not sharing context resources so, second parameters is NULL
        realContext = wglCreateContextAttribsARB(hdc, NULL, contextAttribs);

        // Check for error context creation errors
        // ERROR_INVALID_VERSION_ARB (0x2095)
        // ERROR_INVALID_PROFILE_ARB (0x2096)
        if (realContext == NULL) TRACELOG(LOG_ERROR, "GL: Error creating requested context: %lu", GetLastError());
    }

    // Cleanup dummy temp context
    wglMakeCurrent(NULL, NULL);
    wglDeleteContext(tempContext);

    // Activate real context
    if (realContext) wglMakeCurrent(hdc, realContext);

    // Once we got a real modern OpenGL context,
    // we can load required extensions (function pointers)
    rlLoadExtensions(WglGetProcAddress);

    return realContext;
}

// Initialize platform: graphics, inputs and more
int InitPlatform(void)
{
    int result = 0;

    platform.appScreenWidth = CORE.Window.screen.width;
    platform.appScreenHeight = CORE.Window.screen.height;
    platform.desiredFlags = SanitizeFlags(0 /*SANITIZE_FLAGS_FIRST*/, CORE.Window.flags);

    // NOTE: From this point CORE.Window.flags should always reflect the actual state of the window
    CORE.Window.flags = FLAG_WINDOW_HIDDEN | (platform.desiredFlags & FLAG_MASK_NO_UPDATE);

/*
    // TODO: Review SetProcessDpiAwarenessContext()
    // NOTE: SetProcessDpiAwarenessContext() requires Windows 10, version 1703 and shcore.lib linkage
    if (IsWindows10Version1703OrGreaterWin32())
    {
        TRACELOG(LOG_INFO, "DpiAware: >=Win10Creators");
        if (!SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2))
            TRACELOG(LOG_ERROR, "%s failed, error %u", "SetProcessDpiAwarenessContext", GetLastError());
    }
    else
    {
        TRACELOG(LOG_INFO, "DpiAware: <Win10Creators");
        HRESULT hr = SetProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE);
        if (hr < 0) TRACELOG(LOG_ERROR, "%s failed, hresult=0x%lx", "SetProcessDpiAwareness", (DWORD)hr);
    }
*/

    HINSTANCE hInstance = GetModuleHandleW(0);

    // Define window class
    WNDCLASSEXW windowClass = {
        .cbSize = sizeof(WNDCLASSEXW),
        .style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC,
        .lpfnWndProc = WndProc,                         // Custom procedure assigned
        .cbWndExtra = sizeof(LONG_PTR),                 // extra space for the Tuple object ptr
        .hInstance = hInstance,
        .hCursor = LoadCursorW(NULL, (LPCWSTR)IDC_ARROW), // TODO: Audit if we want to set this since we're implementing WM_SETCURSOR
        .lpszClassName = CLASS_NAME                     // Class name: L"raylibWindow"
    };

    // Load user-provided icon if available
    // NOTE: raylib resource file defaults to GLFW_ICON id, so looking for same identifier
    windowClass.hIcon = LoadImageW(hInstance, L"GLFW_ICON", IMAGE_ICON, 0, 0, LR_DEFAULTSIZE | LR_SHARED);
    if (!windowClass.hIcon) windowClass.hIcon = LoadImageW(NULL, (LPCWSTR)IDI_APPLICATION, IMAGE_ICON, 0, 0, LR_DEFAULTSIZE | LR_SHARED);

    // Register window class
    result = (int)RegisterClassExW(&windowClass);
    if (result == 0) TRACELOG(LOG_ERROR, "WIN32: Failed to register window class [ERROR: %lu]", GetLastError());

    // Get primary monitor info
    POINT primaryTopLeft = { 0 };
    HMONITOR monitor = MonitorFromPoint(primaryTopLeft, MONITOR_DEFAULTTOPRIMARY);
    if (monitor != NULL)
    {
        MONITORINFO info = { 0 };
        info.cbSize = sizeof(info);
        result = (int)GetMonitorInfoW(monitor, &info);

        if (result == 0) TRACELOG(LOG_WARNING, "WIN32: DISPLAY: Failed to get monitor info [ERROR: %u]", GetLastError());
        else
        {
            CORE.Window.display.width = info.rcMonitor.right - info.rcMonitor.left;
            CORE.Window.display.height = info.rcMonitor.bottom - info.rcMonitor.top;
        }
    }
    else TRACELOG(LOG_WARNING, "WIN32: DISPLAY: Failed to get primary monitor from point [ERROR: %u]", GetLastError());

    // Adjust the window rectangle so the *client area* matches desired size
    // NOTE: Window width/height includes borders and title-bar
    DWORD style = WS_OVERLAPPEDWINDOW;
    RECT rect = { 0, 0, platform.appScreenWidth, platform.appScreenHeight };
    AdjustWindowRect(&rect, style, FALSE);
    //AdjustWindowRectEx(&rect, WS_OVERLAPPEDWINDOW, FALSE, WINDOW_STYLE_EX);
    //AdjustWindowRectExForDpi(&rect, style, FALSE, WINDOW_STYLE_EX, dpi);
    int windowWidth  = rect.right - rect.left;
    int windowHeight = rect.bottom - rect.top;

    // Create window
    // NOTE: Title string needs to be converted to WCHAR
    WCHAR *titleWide = NULL;
    A_TO_W_ALLOCA(titleWide, CORE.Window.title);

    // Create window and get handle
    platform.hwnd = CreateWindowExW(
        WINDOW_STYLE_EX,
        CLASS_NAME,
        titleWide,
        MakeWindowStyle(CORE.Window.flags),     // WS_OVERLAPPEDWINDOW | WS_VISIBLE
        CW_USEDEFAULT, CW_USEDEFAULT,
        windowWidth, windowHeight,  // TODO: Window size [width, height], needs to be updated?
        NULL, NULL,
        GetModuleHandleW(NULL), NULL);

    if (!platform.hwnd)
    {
        TRACELOG(LOG_ERROR, "WIN32: WINDOW: Failed to create window [ERROR: %lu]", GetLastError());
        return -1;
    }

    // Get handle to device drawing context
    // NOTE: Windows GDI object that represents a drawing surface
    platform.hdc = GetDC(platform.hwnd);

    if (rlGetVersion() == RL_OPENGL_11_SOFTWARE) // Using software renderer
    {
        //ShowWindow(platform.hwnd, SW_SHOWDEFAULT); //SW_SHOWNORMAL

        // Initialize software framebuffer
        BITMAPINFO bmi = { 0 };
        ZeroMemory(&bmi, sizeof(bmi));
        bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
        bmi.bmiHeader.biWidth = platform.appScreenWidth;
        bmi.bmiHeader.biHeight = -(int)(platform.appScreenHeight); // Top-down bitmap
        bmi.bmiHeader.biPlanes = 1;
        bmi.bmiHeader.biBitCount  = 32;         // 32-bit BGRA
        bmi.bmiHeader.biCompression = BI_RGB;

        platform.hdcmem = CreateCompatibleDC(platform.hdc);

        platform.hbitmap = CreateDIBSection(
            platform.hdcmem, &bmi, DIB_RGB_COLORS,
            (void **)&platform.pixels, NULL, 0);

        SelectObject(platform.hdcmem, platform.hbitmap);

        //ReleaseDC(platform.hwnd, platform.hdc); // Required?
    }
    else
    {
        // Init hardware-accelerated OpenGL modern context
        platform.glContext = InitOpenGL(platform.hwnd, platform.hdc);
    }

    CORE.Window.ready = true;

    // Update flags (in case of deferred state change required)
    UpdateFlags(platform.hwnd, platform.desiredFlags, platform.appScreenWidth, platform.appScreenHeight);

    CORE.Window.render.width = CORE.Window.screen.width;
    CORE.Window.render.height = CORE.Window.screen.height;
    CORE.Window.currentFbo.width = CORE.Window.render.width;
    CORE.Window.currentFbo.height = CORE.Window.render.height;
    TRACELOG(LOG_INFO, "DISPLAY: Device initialized successfully");
    TRACELOG(LOG_INFO, "    > Display size: %i x %i", CORE.Window.display.width, CORE.Window.display.height);
    TRACELOG(LOG_INFO, "    > Screen size:  %i x %i", CORE.Window.screen.width, CORE.Window.screen.height);
    TRACELOG(LOG_INFO, "    > Render size:  %i x %i", CORE.Window.render.width, CORE.Window.render.height);
    TRACELOG(LOG_INFO, "    > Viewport offsets: %i, %i", CORE.Window.renderOffset.x, CORE.Window.renderOffset.y);

    if (rlGetVersion() == RL_OPENGL_11_SOFTWARE) // Using software renderer
    {
        TRACELOG(LOG_INFO, "GL: OpenGL device information:");
        TRACELOG(LOG_INFO, "    > Vendor:   %s", "raylib");
        TRACELOG(LOG_INFO, "    > Renderer: %s", "rlsw - OpenGL 1.1 Software Renderer");
        TRACELOG(LOG_INFO, "    > Version:  %s", "1.0");
        TRACELOG(LOG_INFO, "    > GLSL:     %s", "NOT SUPPORTED");
    }

    // Initialize timming system
    //----------------------------------------------------------------------------
    LARGE_INTEGER time = { 0 };
    QueryPerformanceCounter(&time);
    QueryPerformanceFrequency(&platform.timerFrequency);
    CORE.Time.base = time.QuadPart;

    InitTimer();
    //----------------------------------------------------------------------------

    // Initialize storage system
    //----------------------------------------------------------------------------
    CORE.Storage.basePath = GetWorkingDirectory();
    //----------------------------------------------------------------------------

    TRACELOG(LOG_INFO, "PLATFORM: DESKTOP: WIN32: Initialized successfully");

    return 0;
}

// Close platform
void ClosePlatform(void)
{
    if (platform.hwnd)
    {
        int result = DestroyWindow(platform.hwnd);
        if (result == 0) TRACELOG(LOG_WARNING, "WIN32: WINDOW: Failed on window destroy [ERROR: %u]", GetLastError());
        platform.hwnd = NULL;
    }
}

// Window procedure, message processing callback
// NOTE: All window event messages are processed here
static LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
{
    LRESULT result = 0;

    // Sanity check
    DWORD mask = STYLE_MASK_ALL;
    if (platform.hwnd == hwnd)
    {
        if (msg == WM_WINDOWPOSCHANGING) mask &= ~(WS_MINIMIZE | WS_MAXIMIZE);
        CheckFlags("WndProc", hwnd, CORE.Window.flags, MakeWindowStyle(CORE.Window.flags), mask);
    }

    FlagsOp flagsOp = { 0 };
    FlagsOp *deferredFlags = &flagsOp;

    // Message processing
    //------------------------------------------------------------------------------------
    switch (msg)
    {
        case WM_CREATE:
        {
            // WARNING: Not recommended to do OpenGL intialization at this point

        } break;
        //case WM_ACTIVATE
        case WM_DESTROY:
        {
            // Clean up for window destruction
            if (rlGetVersion() == RL_OPENGL_11_SOFTWARE) // Using software renderer
            {
                if (platform.hdcmem)
                {
                    DeleteDC(platform.hdcmem);
                    platform.hdcmem = NULL;
                }

                if (platform.hbitmap)
                {
                    DeleteObject(platform.hbitmap); // Clears platform.pixels data
                    platform.hbitmap = NULL;
                    platform.pixels = NULL; // NOTE: Pointer invalid after DeleteObject()
                }
            }
            else // OpenGL hardware renderer
            {
                wglMakeCurrent(platform.hdc, NULL);
                if (platform.glContext)
                {
                    if (!wglDeleteContext(platform.glContext)) abort();
                    platform.glContext = NULL;
                }
            }

            if (platform.hdc)
            {
                if (!ReleaseDC(hwnd, platform.hdc)) abort();
                platform.hdc = NULL;
            }

            PostQuitMessage(0);

        } break;
        case WM_CLOSE: CORE.Window.shouldClose = true; break; // Window close button [x], ALT+F4
        //case WM_QUIT: // Application closing, not related to window
        case WM_KILLFOCUS:
        {
            memset(CORE.Input.Keyboard.previousKeyState, 0, sizeof(CORE.Input.Keyboard.previousKeyState));
            memset(CORE.Input.Keyboard.currentKeyState, 0, sizeof(CORE.Input.Keyboard.currentKeyState));
        } break;
        case WM_SIZING:
        {
            if (CORE.Window.flags & FLAG_WINDOW_RESIZABLE)
            {
                // TODO: Enforce min/max size
            }
            else TRACELOG(LOG_WARNING, "WIN32: WINDOW: Trying to resize a non-resizable window");

            result = TRUE;
        } break;
        case WM_STYLECHANGING:
        {
            if (wparam == GWL_STYLE)
            {
                STYLESTRUCT *ss = (STYLESTRUCT *)lparam;
                GetStyleChangeFlagOps(CORE.Window.flags, ss, deferredFlags);

                UINT dpi = GetDpiForWindow(hwnd);
                // Get client size (framebuffer inside the window)
                RECT rect = { 0 };
                GetClientRect(hwnd, &rect);
                SIZE clientSize = { rect.right, rect.bottom };
                SIZE oldSize = CalcWindowSize(dpi, clientSize, ss->styleOld);
                SIZE newSize = CalcWindowSize(dpi, clientSize, ss->styleNew);

                if (oldSize.cx != newSize.cx || oldSize.cy != newSize.cy)
                {
                    TRACELOG(LOG_INFO, "WIN32: WINDOW: Resize from style change [%dx%d] to [%dx%d]", oldSize.cx, oldSize.cy, newSize.cx, newSize.cy);

                    if (CORE.Window.flags & FLAG_WINDOW_MAXIMIZED)
                    {
                        // looks like windows will automatically "unminimize" a window
                        // if a style changes modifies it's size
                        TRACELOG(LOG_INFO, "WIN32: WINDOW: Style change modifed window size, removing maximized flag");
                        deferredFlags->clear |= FLAG_WINDOW_MAXIMIZED;
                    }
                }
            }
        } break;
        case WM_WINDOWPOSCHANGING:
        {
            WINDOWPOS *pos = (WINDOWPOS *)lparam;
            if (pos->flags & SWP_SHOWWINDOW) deferredFlags->clear |= FLAG_WINDOW_HIDDEN;
            else if (pos->flags & SWP_HIDEWINDOW) deferredFlags->set |= FLAG_WINDOW_HIDDEN;

            Mized mized = MIZED_NONE;
            bool isIconic = IsIconic(hwnd);
            bool styleMinimized = !!(WS_MINIMIZE & GetWindowLongPtrW(hwnd, GWL_STYLE));
            if (isIconic != styleMinimized) TRACELOG(LOG_WARNING, "WIN32: IsIconic state different from WS_MINIMIZED state");

            if (isIconic) mized = MIZED_MIN;
            else
            {
                WINDOWPLACEMENT placement;
                placement.length = sizeof(placement);
                if (!GetWindowPlacement(hwnd, &placement)) TRACELOG(LOG_ERROR, "WIN32: WINDOW: FAiled to get monitor placement [ERROR: %lu]", GetLastError());

                if (placement.showCmd == SW_SHOWMAXIMIZED) mized = MIZED_MAX;
            }

            switch (mized)
            {
                case MIZED_NONE:
                {
                    deferredFlags->clear |= (FLAG_WINDOW_MINIMIZED | FLAG_WINDOW_MAXIMIZED);
                    HMONITOR monitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTOPRIMARY);
                    MONITORINFO info;
                    info.cbSize = sizeof(info);
                    if (!GetMonitorInfoW(monitor, &info)) TRACELOG(LOG_ERROR, "WIN32: MONITOR: Failed to get monitor info [ERROR: %lu]", GetLastError());

                    if ((pos->x == info.rcMonitor.left) &&
                        (pos->y == info.rcMonitor.top) &&
                        (pos->cx == (info.rcMonitor.right - info.rcMonitor.left)) &&
                        (pos->cy == (info.rcMonitor.bottom - info.rcMonitor.top))) deferredFlags->set |= FLAG_BORDERLESS_WINDOWED_MODE;
                    else deferredFlags->clear |= FLAG_BORDERLESS_WINDOWED_MODE;

                } break;
                case MIZED_MIN:
                {
                    // !!! NOTE !!! Do not update the maximized/borderless
                    // flags because when hwnd is minimized it temporarily overrides
                    // the maximized state/flag which gets restored on SW_RESTORE
                    deferredFlags->set |= FLAG_WINDOW_MINIMIZED;
                } break;
                case MIZED_MAX:
                {
                    deferredFlags->clear |= FLAG_WINDOW_MINIMIZED;
                    deferredFlags->set |= FLAG_WINDOW_MAXIMIZED;
                } break;
                default: break;
            }
        } break;
        case WM_SIZE:
        {
            // WARNING: Don't trust the docs, they say you won't get this message if you don't call DefWindowProc
            // in response to WM_WINDOWPOSCHANGED but looks like when a window is created you'll get this
            // message without getting WM_WINDOWPOSCHANGED
            HandleWindowResize(hwnd, &platform.appScreenWidth, &platform.appScreenHeight);
        } break;
        //case WM_MOVE
        case WM_WINDOWPOSCHANGED:
        {
            WINDOWPOS *pos = (WINDOWPOS*)lparam;
            if (!(pos->flags & SWP_NOSIZE)) HandleWindowResize(hwnd, &platform.appScreenWidth, &platform.appScreenHeight);
        } break;
        case WM_GETDPISCALEDSIZE:
        {
            SIZE *inoutSize = (SIZE *)lparam;
            UINT newDpi = (UINT)wparam; // TODO: WARNING: Converting from WPARAM = UINT_PTR

            // for any of these other cases, we might want to post a window
            // resize event after the dpi changes?
            if (CORE.Window.flags & FLAG_WINDOW_MINIMIZED) return TRUE;
            if (CORE.Window.flags & FLAG_WINDOW_MAXIMIZED) return TRUE;
            if (CORE.Window.flags & FLAG_BORDERLESS_WINDOWED_MODE) return TRUE;

            float dpiScale = ((float)newDpi)/96.0f;
            bool dpiScaling = CORE.Window.flags & FLAG_WINDOW_HIGHDPI;
            // Get size in pixels from points
            SIZE desired = {
                .cx = dpiScaling? (int)((float)platform.appScreenWidth*dpiScale) : platform.appScreenWidth,
                .cy = dpiScaling? (int)((float)platform.appScreenHeight*dpiScale) : platform.appScreenHeight
            };
            inoutSize->cx = desired.cx;
            inoutSize->cy = desired.cy;

            result = TRUE;
        } break;
        case WM_DPICHANGED:
        {
            RECT *suggestedRect = (RECT *)lparam;

            // Never set the window size to anything other than the suggested rect here
            // Doing so can cause a window to stutter between monitors when transitioning between them
            int result = (int)SetWindowPos(hwnd, NULL, suggestedRect->left, suggestedRect->top,
                suggestedRect->right - suggestedRect->left, suggestedRect->bottom - suggestedRect->top, SWP_NOZORDER | SWP_NOACTIVATE);
            if (result == 0) TRACELOG(LOG_ERROR, "Failed to set window position [ERROR: %lu]", GetLastError());

        } break;
        case WM_SETCURSOR:
        {
            // Called when mouse moves, enters/leaves window...
            if (LOWORD(lparam) == HTCLIENT)
            {
                SetCursor(CORE.Input.Mouse.cursorHidden? NULL : LoadCursorW(NULL, (LPCWSTR)IDC_ARROW));
                return 0;
            }

            result = DefWindowProc(hwnd, msg, wparam, lparam);
        } break;
        case WM_PAINT:
        {
            if (rlGetVersion() == RL_OPENGL_11_SOFTWARE) // Using software renderer
            {
                PAINTSTRUCT ps = { 0 };
                HDC hdc = BeginPaint(hwnd, &ps);

                // Blit from memory DC to window DC
                BitBlt(hdc, 0, 0, platform.appScreenWidth, platform.appScreenHeight, platform.hdcmem, 0, 0, SRCCOPY);

                EndPaint(hwnd, &ps);
            }
        }
        case WM_INPUT:
        {
            //HandleRawInput(lparam);
        } break;
        case WM_MOUSEMOVE:
        {
            if (!CORE.Input.Mouse.cursorLocked)
            {
                CORE.Input.Mouse.currentPosition.x = (float)GET_X_LPARAM(lparam);
                CORE.Input.Mouse.currentPosition.y = (float)GET_Y_LPARAM(lparam);
                CORE.Input.Touch.position[0] = CORE.Input.Mouse.currentPosition;
            }
        } break;
        case WM_KEYDOWN: HandleKey(wparam, lparam, 1); break;
        case WM_KEYUP: HandleKey(wparam, lparam, 0); break;
        case WM_LBUTTONDOWN: HandleMouseButton(MOUSE_BUTTON_LEFT, 1); break;
        case WM_LBUTTONUP  : HandleMouseButton(MOUSE_BUTTON_LEFT, 0); break;
        case WM_RBUTTONDOWN: HandleMouseButton(MOUSE_BUTTON_RIGHT, 1); break;
        case WM_RBUTTONUP  : HandleMouseButton(MOUSE_BUTTON_RIGHT, 0); break;
        case WM_MBUTTONDOWN: HandleMouseButton(MOUSE_BUTTON_MIDDLE, 1); break;
        case WM_MBUTTONUP  : HandleMouseButton(MOUSE_BUTTON_MIDDLE, 0); break;
        case WM_XBUTTONDOWN:
        {
            switch (HIWORD(wparam))
            {
                case XBUTTON1: HandleMouseButton(MOUSE_BUTTON_SIDE, 1); break;
                case XBUTTON2: HandleMouseButton(MOUSE_BUTTON_EXTRA, 1); break;
                default: TRACELOG(LOG_WARNING, "TODO: handle ex mouse button DOWN wparam=%u", HIWORD(wparam)); break;
            }
        } break;
        case WM_XBUTTONUP:
        {
            switch (HIWORD(wparam))
            {
                case XBUTTON1: HandleMouseButton(MOUSE_BUTTON_SIDE, 0); break;
                case XBUTTON2: HandleMouseButton(MOUSE_BUTTON_EXTRA, 0); break;
                default: TRACELOG(LOG_WARNING, "TODO: handle ex mouse button UP   wparam=%u", HIWORD(wparam)); break;
            }
        } break;
        case WM_MOUSEWHEEL: CORE.Input.Mouse.currentWheelMove.y = ((float)GET_WHEEL_DELTA_WPARAM(wparam))/WHEEL_DELTA; break;
        case WM_MOUSEHWHEEL: CORE.Input.Mouse.currentWheelMove.x = ((float)GET_WHEEL_DELTA_WPARAM(wparam))/WHEEL_DELTA; break;
        case WM_APP_UPDATE_WINDOW_SIZE:
        {
            //UpdateWindowSize(UPDATE_WINDOW_NORMAL, hwnd, platform.appScreenWidth, platform.appScreenHeight, CORE.Window.flags);
        } break;

        default: result = DefWindowProcW(hwnd, msg, wparam, lparam); // Message passed directly for execution (default behaviour)
    }
    //------------------------------------------------------------------------------------

    // Sanity check for flags
    if (platform.hwnd == hwnd) CheckFlags("After WndProc", hwnd, CORE.Window.flags, MakeWindowStyle(CORE.Window.flags), mask);

    // Operations to execute after the above check
    if (flagsOp.set & flagsOp.clear) TRACELOG(LOG_WARNING, "WIN32: FLAGS: Flags 0x%x were both set and cleared", flagsOp.set & flagsOp.clear);

    DWORD save = CORE.Window.flags;
    CORE.Window.flags |= flagsOp.set;
    CORE.Window.flags &= ~flagsOp.clear;
    if (save != CORE.Window.flags) TRACELOG(LOG_DEBUG, "WIN32: FLAGS: Current deferred flags: 0x%x > 0x%x (diff 0x%x)", save, CORE.Window.flags, save ^ CORE.Window.flags);

    return result;
}

// Handle keyboard input event
static void HandleKey(WPARAM wparam, LPARAM lparam, char state)
{
    KeyboardKey key = GetKeyFromWparam(wparam);

    // TODO: Use scancode?
    //BYTE scancode = lparam >> 16;
    //TRACELOG(LOG_INFO, "KEY key=%d vk=%lu scan=%u = %u", key, wparam, scancode, state);

    if (key != KEY_NULL)
    {
        CORE.Input.Keyboard.currentKeyState[key] = state;

        if ((key == KEY_ESCAPE) && (state == 1)) CORE.Window.shouldClose = 1;
    }
    else TRACELOG(LOG_WARNING, "INPUT: Unknown (or currently unhandled) virtual keycode %d (0x%x)", wparam, wparam);

    // TODO: Add key to the queue as well?
}

// Handle mouse button input event
static void HandleMouseButton(int button, char state)
{
    // Register current mouse button state
    CORE.Input.Mouse.currentButtonState[button] = state;
    CORE.Input.Touch.currentTouchState[button] = state;
}

// Handle raw input event
static void HandleRawInput(LPARAM lparam)
{
    RAWINPUT input = { 0 };

    UINT inputSize = sizeof(input);
    UINT size = GetRawInputData((HRAWINPUT)lparam, RID_INPUT, &input, &inputSize, sizeof(RAWINPUTHEADER));

    if (size == (UINT)-1) TRACELOG(LOG_ERROR, "WIN32: Failed to get raw input data [ERROR: %lu]", GetLastError());

    if (input.header.dwType != RIM_TYPEMOUSE) TRACELOG(LOG_ERROR, "WIN32: Unexpected WM_INPUT type %lu", input.header.dwType);

    if (input.data.mouse.usFlags & MOUSE_MOVE_ABSOLUTE) TRACELOG(LOG_ERROR, "TODO: handle absolute mouse inputs!");

    if (input.data.mouse.usFlags & MOUSE_VIRTUAL_DESKTOP) TRACELOG(LOG_ERROR, "TODO: handle virtual desktop mouse inputs!");

    // Trick to keep the mouse position at 0,0 and instead move
    // the previous position so we can still get a proper mouse delta
    //CORE.Input.Mouse.previousPosition.x -= input.data.mouse.lLastX;
    //CORE.Input.Mouse.previousPosition.y -= input.data.mouse.lLastY;
    //if (CORE.Input.Mouse.currentPosition.x != 0) abort();
    //if (CORE.Input.Mouse.currentPosition.y != 0) abort();
}

// Handle window resizing event
static void HandleWindowResize(HWND hwnd, int *width, int *height)
{
    if (CORE.Window.flags & FLAG_WINDOW_MINIMIZED) return;

    // Get client size (framebuffer inside the window)
    RECT rect = { 0 };
    GetClientRect(hwnd, &rect);
    SIZE clientSize = { rect.right, rect.bottom };

    // TODO: Update framebuffer on resize
    CORE.Window.currentFbo.width = (int)clientSize.cx;
    CORE.Window.currentFbo.height = (int)clientSize.cy;
    //glViewport(0, 0, clientSize.cx, clientSize.cy);
    //SetupFramebuffer(0, 0);

    SetupViewport(clientSize.cx, clientSize.cy);
    CORE.Window.resizedLastFrame = true;
    float dpiScale = ((float)GetDpiForWindow(hwnd))/96.0f;
    bool highdpi = !!(CORE.Window.flags & FLAG_WINDOW_HIGHDPI);
    unsigned int screenWidth = highdpi? (unsigned int)(((float)clientSize.cx)/dpiScale) : clientSize.cx;
    unsigned int screenHeight = highdpi? (unsigned int)(((float)clientSize.cy)/dpiScale) : clientSize.cy;
    CORE.Window.screen.width = screenWidth;
    CORE.Window.screen.height = screenHeight;

    if (AdoptWindowResize(CORE.Window.flags))
    {
        TRACELOG(LOG_DEBUG, "WIN32: WINDOW: Updating app size to [%ix%i] from window resize", screenWidth, screenHeight);
        *width = screenWidth;
        *height = screenHeight;
    }

    CORE.Window.screenScale = MatrixScale( (float)CORE.Window.render.width/CORE.Window.screen.width,
        (float)CORE.Window.render.height/CORE.Window.screen.height, 1.0f);
}

// Update window style
static void UpdateWindowStyle(HWND hwnd, unsigned desiredFlags)
{
    DWORD current = STYLE_MASK_WRITABLE & MakeWindowStyle(CORE.Window.flags);
    DWORD desired = STYLE_MASK_WRITABLE & MakeWindowStyle(desiredFlags);

    if (current != desired)
    {
        SetLastError(0);
        DWORD previous = STYLE_MASK_WRITABLE & SetWindowLongPtrW(hwnd, GWL_STYLE, desired);
        if (previous != current)
        {
            TRACELOG(LOG_ERROR, "WIN32: WINDOW: SetWindowLongPtr() returned writable flags 0x%x but expected 0x%x (diff=0x%x, error=%lu)",
                previous, current, previous ^ current, GetLastError());
        }

        CheckFlags("UpdateWindowStyle", hwnd, desiredFlags, desired, STYLE_MASK_WRITABLE);
    }

    // Minimized takes precedence over maximized
    Mized currentMized = MIZED_NONE;
    Mized desiredMized = MIZED_NONE;
    if (CORE.Window.flags & WS_MINIMIZE) currentMized = MIZED_MIN;
    else if (CORE.Window.flags & WS_MAXIMIZE) currentMized = MIZED_MAX;
    if (desiredFlags & WS_MINIMIZE) currentMized = MIZED_MIN;
    else if (desiredFlags & WS_MAXIMIZE) currentMized = MIZED_MAX;

    if (currentMized != desiredMized)
    {
        switch (desiredMized)
        {
            case MIZED_NONE: ShowWindow(hwnd, SW_RESTORE); break;
            case MIZED_MIN: ShowWindow(hwnd, SW_MINIMIZE); break;
            case MIZED_MAX: ShowWindow(hwnd, SW_MAXIMIZE); break;
        }
    }
}

// Sanitize flags
static unsigned SanitizeFlags(int mode, unsigned flags)
{
    if ((flags & FLAG_WINDOW_MAXIMIZED) && (flags & FLAG_BORDERLESS_WINDOWED_MODE))
    {
        TRACELOG(LOG_WARNING, "WIN32: WINDOW: Borderless windows mode overriding maximized window flag");
        flags &= ~FLAG_WINDOW_MAXIMIZED;
    }

    if (mode == 1)
    {
        if ((flags & FLAG_MSAA_4X_HINT) && (!(CORE.Window.flags & FLAG_MSAA_4X_HINT)))
        {
            TRACELOG(LOG_WARNING, "WIN32: WINDOW: MSAA can only be configured before window initialization");
            flags &= ~FLAG_MSAA_4X_HINT;
        }
    }

    return flags;
}

// All window state changes from raylib flags go through this function. It performs
// whatever operations are needed to update the window state to match the desired flags
// In most cases this function should not update CORE.Window.flags directly, instead,
// the window itself should update CORE.Window.flags in response to actual state changes
// This means that CORE.Window.flags should always represent the actual state of the
// window. This function will continue to perform these update operations so long as
// the state continues to change
//
// This design takes care of many odd corner cases. For example, if you want to restore
// a window that was previously maximized AND minimized and you want to remove both these
// flags, you actually need to call ShowWindow with SW_RESTORE twice. Another example is
// if you have a maximized window, if the undecorated flag is modified then we'd need to
// update the window style, but updating the style would mean the window size would change
// causing the window to lose its Maximized state which would mean we'd need to update the
// window size and then update the window style a second time to restore that maximized
// state. This implementation is able to handle any/all of these special situations with a
// retry loop that continues until we either reach the desired state or the state stops changing
static void UpdateFlags(HWND hwnd, unsigned desiredFlags, int width, int height)
{
    // Flags that just apply immediately without needing any operations
    CORE.Window.flags |= (desiredFlags & FLAG_MASK_NO_UPDATE);

    int vsync = (CORE.Window.flags & FLAG_VSYNC_HINT)? 1 : 0;
    if (wglSwapIntervalEXT)
    {
        (*wglSwapIntervalEXT)(vsync);
        if (vsync) CORE.Window.flags |= FLAG_VSYNC_HINT;
        else CORE.Window.flags &= ~FLAG_VSYNC_HINT;
    }

    // TODO: Review all this code...
    DWORD previousStyle = 0;
    for (unsigned attempt = 1; ; attempt++)
    {
        CheckFlags("UpdateFlags", hwnd, CORE.Window.flags, MakeWindowStyle(CORE.Window.flags), STYLE_MASK_ALL);

        bool windowSizeUpdated = false;
        if (MakeWindowStyle(CORE.Window.flags) == MakeWindowStyle(desiredFlags))
        {
            windowSizeUpdated = UpdateWindowSize(1, hwnd, width, height, desiredFlags);
            if ((FLAG_MASK_REQUIRED & desiredFlags) == (FLAG_MASK_REQUIRED & CORE.Window.flags)) break;
        }


        if ((attempt > 1) && (previousStyle == MakeWindowStyle(CORE.Window.flags)) && !windowSizeUpdated)
        {
            TRACELOG(LOG_ERROR, "WIN32: WINDOW: UpdateFlags() failed after %u attempt(s) wanted 0x%x but is 0x%x (diff=0x%x)",
                attempt, desiredFlags, CORE.Window.flags, desiredFlags ^ CORE.Window.flags);
        }

        previousStyle = MakeWindowStyle(CORE.Window.flags);
        UpdateWindowStyle(hwnd, desiredFlags);
    }
}

// Check if OpenGL extension is available
static bool IsWglExtensionAvailable(HDC hdc, const char *extension)
{
    bool result = false;

    if (wglGetExtensionsStringARB != NULL)
    {
        const char *extList = wglGetExtensionsStringARB(hdc);
        if (extList != NULL)
        {
            // Simple substring search (could use strtok or strstr)
            if (strstr(extList, extension) != NULL) result = true;
        }
    }

    return result;
}